... , rings, and nuts, including the bracket, are made from high quality A4 316 stainless steel. 10. A special ventilating gland is ... Patented heat dissipation technology for radiator. 14. Toughened glass for light protection; both matt and clear glass available. 15. Closed ... corrosion-proof silicone ring for dustproof and waterproof; cool light source(LED) for anti-explosion(safe for gas station etc ...